
.col-md-4{
    width: 100%;
    height: 500px;
    /* background-color: black; */
}
.body_header{
    width: 100%;
    height: 0px;
    /* background-color: black; */
    position: relative;
}
.dot_line{
    width: 50px;
    height: 100px;
    float: left;
}
.dot{
    width: 50px;
    height: 50px;
    border-radius: 50px;
    background-color: rgb(196, 196, 196);
}
.line{
    width: 1px;
    height: 100px;
    background-color: rgb(196, 196, 196);
    margin: auto;
}
.content{
    width: 90%;
    height: 100px;
    /* background-color: rgb(255, 0, 0); */
    float: left;
    position: absolute;
    left: 60px;
}